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Disk drive enclosure for minimizing stresses and a vibration damping seal therefor

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Publication number
US5021905A
US5021905A US07434653 US43465389A US5021905A US 5021905 A US5021905 A US 5021905A US 07434653 US07434653 US 07434653 US 43465389 A US43465389 A US 43465389A US 5021905 A US5021905 A US 5021905A
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US
Grant status
Grant
Patent type
Prior art keywords
disk
drive
cover
base
tape
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US07434653
Inventor
Roger R. Sleger
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HP Inc
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HP Inc
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    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B25/00Apparatus characterised by the shape of record carrier employed but not specific to the method of recording or reproducing, e.g. dictating apparatus; Combinations of such apparatus
    • G11B25/04Apparatus characterised by the shape of record carrier employed but not specific to the method of recording or reproducing, e.g. dictating apparatus; Combinations of such apparatus using flat record carriers, e.g. disc, card
    • G11B25/043Apparatus characterised by the shape of record carrier employed but not specific to the method of recording or reproducing, e.g. dictating apparatus; Combinations of such apparatus using flat record carriers, e.g. disc, card using rotating discs
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B33/00Constructional parts, details or accessories not provided for in the preceding groups
    • G11B33/02Cabinets; Cases; Stands; Disposition of apparatus therein or thereon
    • G11B33/08Insulation or absorption of undesired vibrations or sounds
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B33/00Constructional parts, details or accessories not provided for in the preceding groups
    • G11B33/14Reducing influence of physical parameters, e.g. temperature change, moisture, dust

Abstract

A disk drive in which the base and the cover are interconnected in spaced positions to provide a marginal, peripheral gap between confronting or adjacent faces or edges thereof. The gap is bridged, closed and sealed by means of a pressure sensitive adhesive tape, a viscoelastic tape, which is energy adsorbing to damp disk drive vibrations.

Description

FIELD OF THE INVENTION

This invention relates to the sealing of a hard magnetic disk drive enclosure.

BACKGROUND OF THE INVENTION

Disk drive enclosures are sealed to prevent the entry of contamination that would damage the internal head/disk interface. Hard disk drives are manufactured in clean environments and are sealed prior to moving them into normal user environments. The internal disk parts, such as the disk stack assembly and the moveable actuator which mounts the magnetic heads and which moves the magnetic heads over the surfaces of the disk, are usually assembled onto some form of a base which is part of the main frame of the disk drive. After all of the parts are in place, a protective cover is installed. Thereafter, the cover and the base are sealed to prevent the entry of contaminants into the enclosure.

The magnetic heads inside the disk drives housings must be accurately positioned over data tracks in order to read back data that has previously been written. If drive parts, forming part of the disk stack and the magnetic head suspension assembly, or the main frame, or the cover, change size and/or shape in a changing thermal environment, positional misregistration between the magnetic heads and the pre-written data tracks, can occur which degrade the performance of the disk drive. Disk drive structural parts are manufactured of materials that are elastic and substantially rigid with respect to the application to which they are put. Structural rigidity of the parts is needed to ensure adequate dimensional accuracy and stability. Unfortunately, the inherently poor damping qualities of these elastic parts cause head-to-disk positioning errors when the drive is subjected to vibrational inputs. The disk stack assembly which is rotatably mounted on a fixed spindle is often a significant source of input excitation energy that, combined with the undamped drive structure, is a frequent manufacturing problem.

At the time the disk drive cover is installed, according to conventional practice, the drive is sealed by pressing the cover against a compliant gasket which is often made of an elastomeric material. This gasket is compressed between the cover and the base. This form of sealing poses several problems:

In order for a typical gasket to seal a drive, significant pressure must be applied to the gasket. If this pressure remained constant throughout the life of the disk drive, there would be no resulting drive distortion, and no head-to-disk track misregistration. But in reality, the pressure that is applied by the gasket does not remain constant. The material of the gasket relaxes and the pressure reduces over a period of time and exposure to adverse temperatures. Since the stiffness and dimensions of gaskets also change with temperature, drives also usually develop undesirable head-to-disk mistracking as a function of temperature due to the gasket imposed stress changes which affect the position relationship between the cover and the base.

Gaskets are difficult to clean adequately for use in the disk drive. Structural parts of the drive are usually cleaned in an aggressive solvent that cannot be used on the gasket material. Less effective, alternate cleaning processes usually are required for gaskets. Residual contamination on gaskets can cause damage to the delicate head/disk interface inside a disk drive and reduce the reliability of the disk drive.

Gaskets of this type do not lend themselves to automated assembly processes, so usually they are manually placed into position. Because of this, and inherent defects in the composition and/or surface condition of gaskets and their mating surfaces, the consistency and degree of sealing that is achieved is often unsatisfactory.

DISCLOSURE OF THE INVENTION

Problems of the type encountered in the prior art are overcome in the provision of a disk drive structure in which the cover, when installed, is not pressed against the base. Either the cover or the base or both may have side walls, the ends of which are disposed in confronting, or adjacent, but not touching relationship. In one practical embodiment of this invention, four posts are employed which are mounted at one end of each thereof on the base and which at each of their upper ends receive the top plate of the cover. These posts provide flexibility between the base and the top cover connections. They allow the base and the cover to assume minutely different physical dimensions without imposing any large stresses at the post interfaces. In such an arrangement, the posts are permanently attached to the base and the cover is fastened by screws to the top of each post as well as to the top of the disk spindle and the support for the magnetic head actuator suspension assembly. A disk drive structure in which the top of the disk spindle and the top of the support for the actuator are also attached to the cover which incorporates structural flexibility, and materials having low matched thermal coefficients of expansion for achieving positional predictability, is described in a copending application of the applicant U.S. Ser. No. 07/434,661 filed on the same date as this application, entitled Thermally Predicable Disk Drive Mechanism and assigned to the assignee of this invention.

With the present arrangement, in which the cover and the base do not contact one another, there are no large initial stresses applied to the drive parts tending to permanently displace any of them from the physical relationship among the parts which existed at the time data was recorded on the disks. The drive is sealed by employing a viscoelastic tape seal which does not apply stress to the drive parts. The tape is pressed onto the cover and the base, bridging the gap therebetween in a substantially unstressed condition. Since there are nominally no initial stresses, there are no stress changes over time or temperature. The tape seal is intentionally made of a viscoelastic material which does not generate any significant stress on the drive parts as a result of stiffness changes with changes in temperature, as compressed gaskets do.

By adding a constraining layer (a thin layer of stiff backing material such as aluminum) to the outer face viscoelastic seal material, a high degree of resonant damping is achieved in the overall drive structure. Relative motion between the cover and the base of the drive is damped by the viscoelastic coupling that the seal offers. This added damping greatly reduces the natural ringing of the structure as well as its sensitivity to vibration by sources such as the bearings in rotating disk stack assembly of the disk spindle in the drive.

The tape seal is easily applied. It can be supplied in roll form similar to ordinary pressure sensitive adhesive types of tapes and is dispensed directly against the drive surfaces that are being sealed. There is no need to preclean the tape prior to application to the drive surfaces since the adhesive side of the tape faces the interior of the drive, and any particles that might be present are held adhesively by the sticky viscoelastic material.

Tape seals are easily automated for high volume manufacturing through the use of existing technology that has been developed for the packaging industry. The speed, consistency, and cost of this form of sealing is highly desirable in high volume, low cost disk drive manufacturing.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an exploded isometric view of a disk drive sealing arrangement embodying the principles of this invention, and

FIG. 2 is an isometric view of a disk drive of the type of FIG. 1, with the cover installed, showing the partial installation of the tape which seals the drive.

BEST MODE FOR CARRYING OUT THE INVENTION

FIG. 1 illustrates the best mode for practicing this invention presently known to the applicant. It will be appreciated, however, that this invention is not limited to the specific disk drive which is illustrated.

Referring to the drawing, FIG. 1, the disk drive comprises a base or main frame 1 on which a disk spindle 2 is mounted. The base may be a plate, as shown, or may have sides and ends. A disk stack assembly 3, comprising individual disks 3a, is rotatably journaled on the disk spindle 2. This disk stack assembly is rotated at constant speed by a drive motor which is an integral part of the disk spindle. This invention is applicable to both linear or rotary actuator types of disk drives. The disk drive which is illustrated is of the rotary actuator type. An actuator spindle 4 is secured to the main frame or base 1 adjacent an edge of the disk stack assembly 3. An actuator bearing housing 5 is journaled on the actuator spindle 4 and mounts a plurality of actuator arms 6 each of which, in turn, mounts a flexure 7 each of which flexibly mounts a magnetic head 8 at its extremity. Usually a magnetic head on the bottom arm on the bottom side of the bottom disk, is a dedicated servo positioning head and the dedicated servo disk surface then is the bottom surface of the bottom disk on which the servo code defining the individual tracks is recorded.

An electromagnetic driver generally designated 9 is employed to drive the rotary actuator. The electromagnetic driver 9 comprises a coil 10 secured to the bearing housing 5 and a permanent magnet structure, comprising permanent magnets 11, one of which is illustrated disposed below the coil 10 and another, not illustrated, is positioned above the coil 10. The coil 10 when reversibly energized with direct current moves the actuator arms 6 and the magnetic heads 8 in one direction or another in an arc about the actuator spindle 4, radially over the disk surfaces. In this manner, track seeking is accomplished and track following achieved whenever a selected track is found.

A cover 12, having a top plate 13 and depending sides and ends 14, encloses the disk drive assembly. In FIG. 1, this cover 12 is elevated above the disk drive so that the disk drive components may be visible. In assembled position, the innerface of the top plate 13 of the cover 12 seats upon the upper ends of posts 15 which are secured to the base plate or main frame 1 and which project upwardly therefrom. Holes 16 through the upper plate 13 of the cover 12 are aligned with respective threaded holes 17 in the upper ends of the posts 15. The cover is secured to the upper ends of these posts by means of screws 18, only one of which is shown, which extend through the top plate 13 and individually thread into the adjacent threaded hole 17 in the upper end of each of the posts 15. Additionally, screws 19, only one of which is shown, individually extend through respective holes 20 in the top plate 13 and thread into a threaded hole 21 in the upper end of each of the disk spindle 2 and the rotary actuator spindle 4. By securing the upper ends of the disk spindle 2 and the actuator spindle 4 in the top plate 13 of the cover 2, the upper ends of these spindles are stabilized against the cover 12.

The lengths of the posts 15 and the spindles 2 and 4 are dimensioned with respect to the innerface of the plate 13 so that all confronting face portions thereat make contact, without the need for deformation, when the cover 12 is positioned over the disk drive assembly. In this position the lower peripheral edge of the depending sides and ends 14 of the cover 12, does not touch the peripheral upper face portion of the base of the main frame 1. When the screws 18 and 19 are installed, the assembly is secured.

It is essential that these disk drives be protected against the ingress of contaminants, particularly dust. A final seal between the main frame 1 and the cover 12 is achieved by means of a viscoelastic tape 22, which is only fragmentarily shown in FIG. 1, having a surface coated with a pressure sensitive adhesive which provides a peripheral seal at a gap 1a, FIG. 2, between the cover 12 and the main frame 1. In addition to inhibiting the ingress of contaminants at the gap 1a between the cover 12 and the base or main frame 1, the tape 22 can have a relatively high sheer strength, and provide resistance to relative vibrational movement between the adjacent section.. of the cover 12 and the base 1.

Typically, the seal between the base 1 and the cover 12 of a disk drive, as discussed above, is an elastic gasket that is compressed in the gap between the base 1 and the cover 12. This creates an initial stress in the drive base 1 and cover 12 which is usually present at the time the data tracks are first recorded on the disks of the disk stack. Over a period of time, and especially in the presence of elevated temperatures, the gasket material relaxes and the pressure within the gasket material reduces, also reducing the force that it exerts upon the base 1 and the cover 12. Such force reductions typically cause minute dimensional changes and distortions of the disk drive structural members and significant data head-to-track positioning errors may result. The tape seal solves this problem because it does not impose an initially distorting stress on the base or cover and because of the viscous property of the pressure sensitive adhesive, it also does not impose stress due to aging or due to temperature variations of the disk drive. The tape seal, therefore, in this respect, is a simple, low cost sealing solution that does not cause dimensional distortions within the disk drive over time and temperature.

The tape seal has an additional important function in that it provides a high degree of resonant damping in the overall drive structure. This is achieved, according to one embodiment of this invention, by adding a constraining layer, e.g., a thin layer of stiff backing material such as aluminum, annealed aluminum being preferred, to the viscoelastic seal material, which adds stiffness to the outer face of the tape seal and significant shear energy damping of base-to-cover vibrations. This thin layer is applied to the outer face of the tape, the inner face of which is coated with a pressure sensitive adhesive of a type which has effective damping in the temperature range environment of the disk drive. The use of an aluminum layer or film on the tape is exemplary. Any form of tape whether of single layer or multiple layer, having energy absorbing properties, is contemplated herein.

The use of the tape seal, as compared to the compressed gasket discussed above, permits automation for high volume manufacturing. Once the tape is applied by the simple expedient of rolling the tape around the drive at the gap between the cover and the base plate or by rotating the disk drive against a deflectable, pre-loaded tape seal roll riding against the drive, the tape seal can be applied with the required pressure, or, once applied to the drive, a roller may be pressed against the tape seal around the disk drive to provide the proper sealing pressure.

While FIGS. 1 and 2 depict a disk drive having a flat base and a cover 12 with depending sides and ends 14, it will be appreciated that other cover/base configurations may be used in which the base itself has the side portions and the cover may be a flat plate or the base and the cover may have side portions which confront and form a gap 1a in a position intermediate the base 1 and the cover top plate 13.

The use of posts 15 in establishing the positional relationship between the cover 12 and the base 1 is exemplary. The use of posts is advantageous in the sense that they provide a degree of flexibility in the structural relationship between the cover 12 and the base 1. Any means for establishing the structural relationship between the cover 12 and the base 1, forming the gap la and providing a seal which does not stress the disk drive, may be practiced within the spirit and scope of this invention. In any such installation, however, a degree of flexibility between the cover and the base is desirable to minimize, if not entirely eliminate, the possibility of slippage at the joints or innerfaces among these major parts of the disk drive structure. Additionally, such flexible structural provision and positioning of the major parts, permits the use of tape for the seal, which can damp ringing in the structure.

INDUSTRIAL APPLICABILITY

The disk drive enclosure of this invention is applicable in all types of disk drive.

Claims (9)

I claim:
1. A disk drive enclosure in which stresses are minimized, comprising:
a base having a peripheral portion;
a cover having a peripheral portion;
means connecting said cover to said base and supporting said cover spaced from said base in a position defining a gap between said peripheral portion of said base and said peripheral portion of said cover, and
a viscoelastic material having a pressure sensitive adhesive coating adhesively attached to said base and said cover at each said peripheral portion in a position bridging, closing and sealing said gap.
2. The disk enclosure according to claim 1, in which:
said means connecting said cover to said base comprises a plurality of flexible structures, each structure being connected at one end to said base and at the other receiving and supporting said cover.
3. The disk drive enclosure according to claim 2, in which: each flexible structure comprises a post.
4. The disk drive enclosure according to claim 2, in which:
said viscoelastic material having a pressure sensitive adhesive coating is a pressure sensitive adhesive tape which comprises and energy absorbing material for vibration damping.
5. The disk drive enclosure according to claim 4, in which: said energy absorbing material comprises a soft, deformable thin film on said tape.
6. The disk drive enclosure according to claim 5, in which:
said deformable thin film is aluminum.
7. The disk drive enclosure according to claim 2, in which: said viscoelastic material having a pressure sensitive adhesive coating is a pressure sensitive adhesive tape which comprises and energy absorbing material for vibration damping.
8. The disk drive enclosure according to claim 7, in which: said energy absorbing material comprises a soft, deformable thin film on said tape.
9. The disk drive enclosure according to claim 7, in which: said deformable thin film is aluminum.
US07434653 1989-11-13 1989-11-13 Disk drive enclosure for minimizing stresses and a vibration damping seal therefor Expired - Fee Related US5021905A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US07434653 US5021905A (en) 1989-11-13 1989-11-13 Disk drive enclosure for minimizing stresses and a vibration damping seal therefor

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
US07434653 US5021905A (en) 1989-11-13 1989-11-13 Disk drive enclosure for minimizing stresses and a vibration damping seal therefor
CA 2021358 CA2021358C (en) 1989-11-13 1990-07-17 Vibration damping disk drive seal
EP19900311844 EP0428291B1 (en) 1989-11-13 1990-10-29 Vibration damping disk drive seal
DE1990626338 DE69026338D1 (en) 1989-11-13 1990-10-29 Vibration damping seal for disk drive
DE1990626338 DE69026338T2 (en) 1989-11-13 1990-10-29 Vibration damping seal for disk drive
JP30694890A JPH03171491A (en) 1989-11-13 1990-11-13 Disk drive

Publications (1)

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US5021905A true US5021905A (en) 1991-06-04

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US07434653 Expired - Fee Related US5021905A (en) 1989-11-13 1989-11-13 Disk drive enclosure for minimizing stresses and a vibration damping seal therefor

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US (1) US5021905A (en)
JP (1) JPH03171491A (en)
CA (1) CA2021358C (en)
DE (2) DE69026338T2 (en)
EP (1) EP0428291B1 (en)

Cited By (53)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5223996A (en) * 1992-03-20 1993-06-29 Digital Equipment Corporation Combined shock mount frame and seal for a rigid disk drive
US5243495A (en) * 1992-03-20 1993-09-07 Digital Equipment Corporation Removable enclosure housing a rigid disk drive
US5270887A (en) * 1991-12-04 1993-12-14 Western Digital Corporation Compact disk drive head disk assembly with conformable tape seal
US5276577A (en) * 1989-04-17 1994-01-04 International Business Machines Corporation Head-disk enclosure seal for magnetic disk storage device
US5301075A (en) * 1991-05-31 1994-04-05 Teac Corporation Hard disk drive having a shielding structure against electromagnetic noise
US5357386A (en) * 1992-11-13 1994-10-18 Seagate Technology, Inc. Disc drive with head/disc assembly having sealed connectors
US5366200A (en) * 1992-09-29 1994-11-22 Scura John E Shock mount assembly
US5426628A (en) * 1990-11-28 1995-06-20 Nikon Corporation Drive for an optical information recording medium
US5550694A (en) * 1993-07-12 1996-08-27 Western Digital Corporation Magnetic memory disk storage system
US5587855A (en) * 1993-12-01 1996-12-24 Samsung Electronics Co., Ltd. Supporting device for minimizing vibration, noise and external impact of a hard disk drive
US5598306A (en) * 1994-07-29 1997-01-28 International Business Machines Corporation Damping post for reducing acoustic noise in a disk drive
US5613292A (en) * 1992-04-14 1997-03-25 Scitex Corporation Ltd. Method and apparatus for disk drive modification
US5673157A (en) * 1992-10-26 1997-09-30 Fujitsu Limited Integral base plate/spin motor assembly with taped cover
US5696648A (en) * 1996-07-08 1997-12-09 Samsung Electronics Co., Ltd. Sealing device for a hard disk drive
US5702556A (en) * 1993-02-23 1997-12-30 Minnesota Mining And Manufacturing Company Method and apparatus for producing a laminated viscoelastic product
US5703734A (en) * 1994-10-12 1997-12-30 International Business Machines Corporation Disc drive having an integral gasket and continuous outer perimeter shock bumper
US5725931A (en) * 1995-11-03 1998-03-10 Minnesota Mining And Manufacturing Company Constrained layer damper with slit(s) and/or cutout(s)
US5825585A (en) * 1993-11-03 1998-10-20 Maxtor Corporation Laterally constrained and damped mount for a hard disk drive
US5858509A (en) * 1996-11-15 1999-01-12 Digital Equipment Corporation Attenuating vibrations in a mounting shelf for multiple disk drives
US5864441A (en) * 1994-12-08 1999-01-26 International Business Machines Corporation Actuator mounting apparatus for top-down data storage system assembly
US5875067A (en) * 1991-03-22 1999-02-23 Seagate Technology, Inc. Acoustic isolator for a disc drive assembly
US5926366A (en) * 1996-11-15 1999-07-20 Digital Equipment Corporation Tab and slot disk drive vibration reduction structure
US6185807B1 (en) * 1997-01-28 2001-02-13 Seagate Technology Llc Component sealing system
US6201691B1 (en) 1994-12-22 2001-03-13 International Business Machines Corporation Removable electronic subassembly with a compressible shock absorbing device
US6266207B1 (en) * 1998-02-10 2001-07-24 Fujitsu Limited Sound reducing cover seal for information recording apparatus
US6308961B1 (en) * 1999-04-12 2001-10-30 Kokoku Intech Co., Ltd. Gasket for hard disk drive unit use
US6324054B1 (en) 1998-01-26 2001-11-27 Seagate Technology Llc Wrap around shock absorber for disc drives
US6347023B1 (en) * 1997-09-26 2002-02-12 Fujitsu Limited Information recording apparatus with voice coil motor and cover thereof
US6417986B1 (en) 1998-11-16 2002-07-09 Samsung Electronics Co., Ltd. Impact guard for limiting hard disk movement
US6417994B1 (en) 1999-04-22 2002-07-09 Samsung Electronics, Co., Ltd. Swage plate with protruded walls to increase retention torque in hard disk applications
US6430000B1 (en) 2000-04-13 2002-08-06 General Dynamics Information Systems, Inc. Hermetically sealed plural disk drive housing
US6473263B2 (en) 1998-11-17 2002-10-29 Samsung Electronics Co., Ltd. Cover structure of hard disk drive with air damping layer
US6501614B1 (en) 1999-08-19 2002-12-31 Samsung Electronics Co., Ltd. Acoustic insulator for controlling noise generated in a mass storage device
US6510021B1 (en) * 1996-06-03 2003-01-21 Seagate Technology Llc Mechanical isolation for a disc drive spindle motor
US6549372B1 (en) 1998-12-15 2003-04-15 Samsung Electronics Co., Ltd Device for limiting head movement within a hard disk drive
US20030091777A1 (en) * 2001-08-14 2003-05-15 Peter Jones Clean release tape for EMI shielding
US6590738B2 (en) 2001-03-01 2003-07-08 Samsung Electronics Co., Ltd. Particle removal device in a hard disk drive
US6594114B1 (en) * 1999-03-24 2003-07-15 Nitto Denko Corporation Damper and head suspension having the same
US6674608B1 (en) * 1999-05-07 2004-01-06 Seagate Technologies Llc Damped protective cover to improve disc drive acoustics
US6704161B1 (en) 1998-11-06 2004-03-09 Samsung Electronics Co. Ltd. Shock protection skin bumper for a hard disk drive
US6744597B2 (en) 1999-10-29 2004-06-01 Samsung Electronics Co., Ltd. Dynamic absorber for an actuator arm in a disk drive
US6762908B2 (en) 2001-06-18 2004-07-13 Samsung Electronics Co., Ltd. Air razor and disk limiter for a hard disk drive
US20040154032A1 (en) * 2002-12-31 2004-08-05 Chao-Ching Fang Optical disk drive
US20050007733A1 (en) * 2003-07-11 2005-01-13 Samsung Electronics Co., Ltd. Mounting pad for disk drive
US20050099721A1 (en) * 2003-11-12 2005-05-12 Sae Magnetics (H.K.) Ltd. Magnetic disk drive apparatus and manufacturing method of magnetic disk drive apparatus
US20050105211A1 (en) * 2003-11-18 2005-05-19 Sae Magnetics (H.K.) Ltd. Magnetic disk drive apparatus
US6947252B2 (en) 2000-05-10 2005-09-20 Samsung Electronics Co., Ltd. Wave stringer for controlling acoustic noise and shock vibration in a storage device
US6954328B2 (en) 2001-02-09 2005-10-11 Seagate Technology, Llc Multi-layer housing structure with tuned layers using hypothetical modeling
US7032867B2 (en) * 2002-12-19 2006-04-25 Johnson Bruce D Cable clamp
US20070035872A1 (en) * 2005-08-09 2007-02-15 Hitachi Global Storage Technologies Netherlands B.V. Sealing method for magnetic disk drive
US20110128650A1 (en) * 2009-12-02 2011-06-02 Chan Andre S Isolating unstable air pressure in a hard disk drive (hdd)
US8059364B1 (en) 2004-05-04 2011-11-15 Maxtor Corporation Hermetically sealed connector interface
US8873231B2 (en) 2010-12-23 2014-10-28 HGST Netherlands B.V. Electronic device enclosure configured to shield against electromagnetic interference

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0453081A (en) * 1990-06-20 1992-02-20 Tokico Ltd Magnetic disk device
JP3493750B2 (en) * 1994-10-06 2004-02-03 株式会社日立製作所 The magnetic disk device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3925584A (en) * 1972-08-24 1975-12-09 Daiichi Seiyaku Co Adhesive seal and tape for sealing
US4092687A (en) * 1976-09-07 1978-05-30 Sycor, Inc. Disc file assembly
US4199646A (en) * 1977-02-09 1980-04-22 Nitto Electric Industrial Co., Ltd. Heat-activatable, pressure-sensitive adhesive tape or sheet
US4249221A (en) * 1979-04-23 1981-02-03 Sli Industries, Inc. Method and apparatus for preventing contamination of a rotating magnetic disc

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4491888A (en) * 1982-06-28 1985-01-01 Atasi Corporation Memory storage apparatus having vibration-dampened base plate arrangement
JPH0449191B2 (en) * 1986-07-17 1992-08-10 Victor Company Of Japan
US5060095A (en) * 1989-01-31 1991-10-22 International Business Machines Corporation Head-disk enclosure assembly for a magnetic disk storage device
US5081552A (en) * 1989-01-31 1992-01-14 International Business Machines Corporation Rigid magnetic disk drive head disk assembly and enclosure structure
JPH02292791A (en) * 1989-04-17 1990-12-04 Internatl Business Mach Corp <Ibm> Magnetic disk driving device
US5029027A (en) * 1989-11-13 1991-07-02 Hewlett-Packard Company Thermally predictable disk drive mechanism

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3925584A (en) * 1972-08-24 1975-12-09 Daiichi Seiyaku Co Adhesive seal and tape for sealing
US4092687A (en) * 1976-09-07 1978-05-30 Sycor, Inc. Disc file assembly
US4199646A (en) * 1977-02-09 1980-04-22 Nitto Electric Industrial Co., Ltd. Heat-activatable, pressure-sensitive adhesive tape or sheet
US4249221A (en) * 1979-04-23 1981-02-03 Sli Industries, Inc. Method and apparatus for preventing contamination of a rotating magnetic disc

Cited By (64)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5276577A (en) * 1989-04-17 1994-01-04 International Business Machines Corporation Head-disk enclosure seal for magnetic disk storage device
US5426628A (en) * 1990-11-28 1995-06-20 Nikon Corporation Drive for an optical information recording medium
US5557595A (en) * 1990-11-28 1996-09-17 Nikon Corporation Drive for an optical information recording medium
US5875067A (en) * 1991-03-22 1999-02-23 Seagate Technology, Inc. Acoustic isolator for a disc drive assembly
US5301075A (en) * 1991-05-31 1994-04-05 Teac Corporation Hard disk drive having a shielding structure against electromagnetic noise
US5270887A (en) * 1991-12-04 1993-12-14 Western Digital Corporation Compact disk drive head disk assembly with conformable tape seal
US5455728A (en) * 1991-12-04 1995-10-03 Digital Corporation Disk drive employing compact magnetic actuator latch mechanism
US5570250A (en) * 1991-12-04 1996-10-29 Western Digital Corporation Disk drive head disk assembly actuator mount mechanism
US5243495A (en) * 1992-03-20 1993-09-07 Digital Equipment Corporation Removable enclosure housing a rigid disk drive
US5223996A (en) * 1992-03-20 1993-06-29 Digital Equipment Corporation Combined shock mount frame and seal for a rigid disk drive
US5613292A (en) * 1992-04-14 1997-03-25 Scitex Corporation Ltd. Method and apparatus for disk drive modification
US5366200A (en) * 1992-09-29 1994-11-22 Scura John E Shock mount assembly
US5673157A (en) * 1992-10-26 1997-09-30 Fujitsu Limited Integral base plate/spin motor assembly with taped cover
US5357386A (en) * 1992-11-13 1994-10-18 Seagate Technology, Inc. Disc drive with head/disc assembly having sealed connectors
US5702556A (en) * 1993-02-23 1997-12-30 Minnesota Mining And Manufacturing Company Method and apparatus for producing a laminated viscoelastic product
US5550694A (en) * 1993-07-12 1996-08-27 Western Digital Corporation Magnetic memory disk storage system
US5825585A (en) * 1993-11-03 1998-10-20 Maxtor Corporation Laterally constrained and damped mount for a hard disk drive
US5587855A (en) * 1993-12-01 1996-12-24 Samsung Electronics Co., Ltd. Supporting device for minimizing vibration, noise and external impact of a hard disk drive
US5598306A (en) * 1994-07-29 1997-01-28 International Business Machines Corporation Damping post for reducing acoustic noise in a disk drive
US5760998A (en) * 1994-10-12 1998-06-02 International Business Machines Corporation Disk drive with rotatable bumper blocks
US5703734A (en) * 1994-10-12 1997-12-30 International Business Machines Corporation Disc drive having an integral gasket and continuous outer perimeter shock bumper
US6108163A (en) * 1994-10-12 2000-08-22 International Business Machines Corporation Sensitive sensor internally mounted shock for a disk drive
US5864441A (en) * 1994-12-08 1999-01-26 International Business Machines Corporation Actuator mounting apparatus for top-down data storage system assembly
US6201691B1 (en) 1994-12-22 2001-03-13 International Business Machines Corporation Removable electronic subassembly with a compressible shock absorbing device
US5725931A (en) * 1995-11-03 1998-03-10 Minnesota Mining And Manufacturing Company Constrained layer damper with slit(s) and/or cutout(s)
US6510021B1 (en) * 1996-06-03 2003-01-21 Seagate Technology Llc Mechanical isolation for a disc drive spindle motor
US5696648A (en) * 1996-07-08 1997-12-09 Samsung Electronics Co., Ltd. Sealing device for a hard disk drive
US5926366A (en) * 1996-11-15 1999-07-20 Digital Equipment Corporation Tab and slot disk drive vibration reduction structure
US5858509A (en) * 1996-11-15 1999-01-12 Digital Equipment Corporation Attenuating vibrations in a mounting shelf for multiple disk drives
US6185807B1 (en) * 1997-01-28 2001-02-13 Seagate Technology Llc Component sealing system
US6347021B2 (en) 1997-01-28 2002-02-12 Seagate Technology Llc Component sealing system
US6347023B1 (en) * 1997-09-26 2002-02-12 Fujitsu Limited Information recording apparatus with voice coil motor and cover thereof
US6324054B1 (en) 1998-01-26 2001-11-27 Seagate Technology Llc Wrap around shock absorber for disc drives
US6567237B2 (en) 1998-02-10 2003-05-20 Fujitsu Limited Sound reducing cover seal for information recording apparatus
US6266207B1 (en) * 1998-02-10 2001-07-24 Fujitsu Limited Sound reducing cover seal for information recording apparatus
US6704161B1 (en) 1998-11-06 2004-03-09 Samsung Electronics Co. Ltd. Shock protection skin bumper for a hard disk drive
US6417986B1 (en) 1998-11-16 2002-07-09 Samsung Electronics Co., Ltd. Impact guard for limiting hard disk movement
US6473263B2 (en) 1998-11-17 2002-10-29 Samsung Electronics Co., Ltd. Cover structure of hard disk drive with air damping layer
US6549372B1 (en) 1998-12-15 2003-04-15 Samsung Electronics Co., Ltd Device for limiting head movement within a hard disk drive
US6594114B1 (en) * 1999-03-24 2003-07-15 Nitto Denko Corporation Damper and head suspension having the same
US6308961B1 (en) * 1999-04-12 2001-10-30 Kokoku Intech Co., Ltd. Gasket for hard disk drive unit use
US6417994B1 (en) 1999-04-22 2002-07-09 Samsung Electronics, Co., Ltd. Swage plate with protruded walls to increase retention torque in hard disk applications
US6674608B1 (en) * 1999-05-07 2004-01-06 Seagate Technologies Llc Damped protective cover to improve disc drive acoustics
US6501614B1 (en) 1999-08-19 2002-12-31 Samsung Electronics Co., Ltd. Acoustic insulator for controlling noise generated in a mass storage device
US6744597B2 (en) 1999-10-29 2004-06-01 Samsung Electronics Co., Ltd. Dynamic absorber for an actuator arm in a disk drive
US6430000B1 (en) 2000-04-13 2002-08-06 General Dynamics Information Systems, Inc. Hermetically sealed plural disk drive housing
US6947252B2 (en) 2000-05-10 2005-09-20 Samsung Electronics Co., Ltd. Wave stringer for controlling acoustic noise and shock vibration in a storage device
US6954328B2 (en) 2001-02-09 2005-10-11 Seagate Technology, Llc Multi-layer housing structure with tuned layers using hypothetical modeling
US6590738B2 (en) 2001-03-01 2003-07-08 Samsung Electronics Co., Ltd. Particle removal device in a hard disk drive
US6762908B2 (en) 2001-06-18 2004-07-13 Samsung Electronics Co., Ltd. Air razor and disk limiter for a hard disk drive
US20030091777A1 (en) * 2001-08-14 2003-05-15 Peter Jones Clean release tape for EMI shielding
US7032867B2 (en) * 2002-12-19 2006-04-25 Johnson Bruce D Cable clamp
US20040154032A1 (en) * 2002-12-31 2004-08-05 Chao-Ching Fang Optical disk drive
US7213250B2 (en) * 2002-12-31 2007-05-01 Asustek Computer Inc. Optical disk drive with soundproof member
US20050007733A1 (en) * 2003-07-11 2005-01-13 Samsung Electronics Co., Ltd. Mounting pad for disk drive
US20050099721A1 (en) * 2003-11-12 2005-05-12 Sae Magnetics (H.K.) Ltd. Magnetic disk drive apparatus and manufacturing method of magnetic disk drive apparatus
US20050105211A1 (en) * 2003-11-18 2005-05-19 Sae Magnetics (H.K.) Ltd. Magnetic disk drive apparatus
US7315434B2 (en) * 2003-11-18 2008-01-01 Sae Magnetics (H.K.) Ltd. Magnetic disk drive apparatus support arm fixing structure
US8059364B1 (en) 2004-05-04 2011-11-15 Maxtor Corporation Hermetically sealed connector interface
US20070035872A1 (en) * 2005-08-09 2007-02-15 Hitachi Global Storage Technologies Netherlands B.V. Sealing method for magnetic disk drive
US7630170B2 (en) * 2005-08-09 2009-12-08 Hitachi Global Storage Technologies Netherlands B.V. Sealing method for magnetic disk drive
US20110128650A1 (en) * 2009-12-02 2011-06-02 Chan Andre S Isolating unstable air pressure in a hard disk drive (hdd)
US8351150B2 (en) 2009-12-02 2013-01-08 Hgst, Netherlands B.V. Isolating unstable air pressure in a hard disk drive (HDD)
US8873231B2 (en) 2010-12-23 2014-10-28 HGST Netherlands B.V. Electronic device enclosure configured to shield against electromagnetic interference

Also Published As

Publication number Publication date Type
JPH03171491A (en) 1991-07-24 application
DE69026338D1 (en) 1996-05-09 grant
CA2021358A1 (en) 1991-05-14 application
EP0428291A2 (en) 1991-05-22 application
EP0428291B1 (en) 1996-04-03 grant
EP0428291A3 (en) 1992-01-15 application
CA2021358C (en) 1995-08-29 grant
DE69026338T2 (en) 1996-08-14 grant

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